The spawning location of vulnerable ferox trout (Salmo trutta L.) in the Lough Corrib and Lough Mask catchments, Western Ireland.

Ferox trout are large, long-lived, piscivorous trout normally found in deep lakes; they are highly prized by trophy anglers. Lough Corrib and Lough Mask, Western Ireland, have recorded the majority of Irish specimen ferox trout since angling records began. Little was known regarding the spawning location of ferox trout relative to sympatric brown trout, and a radio telemetry study was initiated in both catchments in 2005. Over the period 2005-2009, 79 ferox were captured by angling and radio tagged in Lough Corrib, while 55 ferox were tagged in Lough Mask. Manual and helicopter tracking were carried out on all spawning streams entering both lakes over the autumn/winter period to detect tagged fish. Overall, 37 radio-tagged trout (46.8%) were detected in Lough Corrib streams and 21 tagged trout (38.2%) were recorded from Lough Mask streams. Results from radio tracking indicate that the majority (92%) of ferox trout tagged in Lough Corrib spawned in a single spawning stream, the Cong river, while the majority (76%) of ferox trout tagged in Lough Mask spawned in the Cong canal and Cong river. These results suggest that these streams are most likely the principle spawning locations of ferox trout in both lakes. The occurrence of ferox trout predominantly in single spawning rivers in both catchments highlights the vulnerability of the study ferox populations. As a result of these findings, conservation measures were introduced for ferox trout in both catchments.

Does residential aged care need dental professionals? A qualitative study on dental professionals' perceptions in Australia.

OBJECTIVE: Adults in residential aged care often retain their own teeth following restorative dental procedures during their lives. They may also have physical and psychological comorbidities impacting on oral health including side effects from medications. residents' poor oral hygiene, dental caries and periodontal disease raise questions about the quality of oral health care in aged care facilities. This paper presents findings from a study investigating dental professionals' perceptions of barriers and enablers to providing oral care to residents in such settings. MATERIAL AND METHODS: Following university ethics approval, semi-structured interviews were conducted with 17 dental professionals [five dentists, three oral health therapists (OHTs) and nine dental hygienists] across Australia to address the issue. Interviews were transcribed and analysed for key themes, noting similarities and differences within and between groups that were compared to existing evidence. RESULTS: Key themes emerging from interviews included individual and organisational difficulties dental professionals experience when meeting residents' oral health needs; poor access to dental resources; limited oral health education for aged care staff; and lack of interprofessional collaboration. Suggested enablers to oral health included interprofessional education and practice, reflecting broader trends in health care that positively impact on health outcomes. CONCLUSION: Improving residents' oral health requires appropriate organisational commitment to support dental and non-dental health providers deliver high-quality oral care. This study highlights the need to critically review barriers and enablers to providing such care, particularly as Australia's ageing population increases and longer periods are spent in residential aged care.

Genetic structure of pike (Esox lucius) reveals a complex and previously unrecognized colonization history of Ireland.

AIM: We investigated genetic variation of Irish pike populations and their relationship with European outgroups, in order to elucidate the origin of this species to the island, which is largely assumed to have occurred as a human-mediated introduction over the past few hundred years. We aimed thereby to provide new insights into population structure to improve fisheries and biodiversity management in Irish freshwaters. LOCATION: Ireland, Britain and continental Europe. METHODS: A total of 752 pike (Esox lucius) were sampled from 15 locations around Ireland, and 9 continental European sites, and genotyped at six polymorphic microsatellite loci. Patterns and mechanisms of population genetic structure were assessed through a diverse array of methods, including Bayesian clustering, hierarchical analysis of molecular variance, and approximate Bayesian computation. RESULTS: Varying levels of genetic diversity and a high degree of population genetic differentiation were detected. Clear substructure within Ireland was identified, with two main groups being evident. One of the Irish populations showed high similarity with British populations. The other, more widespread, Irish strain did not group with any European population examined. Approximate Bayesian computation suggested that this widespread Irish strain is older, and may have colonized Ireland independently of humans. MAIN CONCLUSIONS: Population genetic substructure in Irish pike is high and comparable to the levels observed elsewhere in Europe. A comparison of evolutionary scenarios upholds the possibility that pike may have colonized Ireland in two 'waves', the first of which, being independent of human colonization, would represent the first evidence for natural colonization of a non-anadromous freshwater fish to the island of Ireland. Although further investigations using comprehensive genomic techniques will be necessary to confirm this, the present results warrant a reappraisal of current management strategies for this species.

Hybridisation between two cyprinid fishes in a novel habitat: genetics, morphology and life-history traits.

BACKGROUND: The potential role hybridisation in adaptive radiation and the evolution of new lineages has received much recent attention. Hybridisation between roach (Rutilus rutilus L.) and bream (Abramis brama L.) is well documented throughout Europe, however hybrids in Ireland occur at an unprecedented frequency, often exceeding that of both parental species. Utilising an integrated approach, which incorporates geometric morphometrics, life history and molecular genetic analyses we identify the levels and processes of hybridisation present, while also determining the direction of hybridisation, through the analysis of mitochondrial DNA. RESULTS: The presence of F2 hybrids was found to be unlikely from the studied populations, although significant levels of backcrossing, involving both parental taxa was observed in some lakes. Hybridisation represents a viable conduit for introgression of genes between roach and bream. The vast majority of hybrids in all populations studied exhibited bream mitochondrial DNA, indicating that bream are maternal in the majority of crosses. CONCLUSIONS: The success of roach x bream hybrids in Ireland is not due to a successful self reproducing lineage. The potential causes of widespread hybridisation between both species, along with the considerations regarding the role of hybridisation in evolution and conservation, are also discussed.

Oral health and access to dental care: a qualitative investigation among older people in the community.

OBJECTIVE: The aim of this study was to explore older persons' beliefs and attitudes towards oral health and access to and use of dental care services. BACKGROUND: As the proportion of dentate older people increases, the need and demand for dental services will rise (J Public Health Dent, 60, 2000, 276). DESIGN: Focus groups and semi-structured interviews were used for data collection. SETTING AND SUBJECTS: The study participants included 63 older people in Perth, WA. RESULTS: Five major themes emerged from the interviews - the need for information and knowledge; accessibility of services; cost and affordability of oral care; fear and anxiety regarding dental visits and relationships with dentists. Attitudes and behaviours were slow to change in this group. CONCLUSION: This investigation provided important perspectives regarding oral health and dental access for older people residing in the community and demonstrated the importance of understanding this group when considering provision and use of services.

Oral health care issues in aged care facilities in Western Australia: resident and family caregiver views.

OBJECTIVE: To investigate resident and family perceptions and attitudes towards oral health care and access to dental services for aged care facility residents. METHOD: Focus groups and individual interviews with residents and family caregivers were conducted at aged care facilities in the Perth Metropolitan Area, Western Australia. RESULTS: There were 30 participants from twelve aged care facilities (21 residents and nine family caregivers). Five focus groups comprising both residents and family caregivers were conducted in addition to three face-to-face interviews with residents. Both groups considered oral health very important to overall health and quality of life. Family caregivers noted a lack of dental check-ups and specialised professional oral care, particularly in high-care facilities. Low care residents were more likely to have regular dental check-ups or dental treatment and off-site dental visits were straightforward due to their mobility and family member assistance. Family caregivers noted time limitations and lack of expertise in oral health care amongst staff in high-care facilities, and the challenges of maintaining oral care for residents with poor mobility or cognitive impairment. It was considered important that staff and management liaise with family caregivers and family members in provision of oral care. CONCLUSION: Regular oral care, assessment and treatment were considered limited, particularly for residents in high care. There is a need for comprehensive, ongoing oral health programmes involving appropriately trained and empathetic dental health professionals and staff to improve oral health care in Perth's aged care facilities.

Aged care staff perspectives on oral care for residents: Western Australia.

OBJECTIVE: To determine manager and staff perceptions of oral health and dental service issues for residents in aged care facilities in the Perth Metropolitan Area, Western Australia. DESIGN: Focus groups and face-to-face semi-structured interviews with aged care facility managers and staff. SETTING AND SUBJECTS: Personnel at 12 facilities (high-level and low-level care) located in the Perth Metropolitan Area participated in the study. Interviews were conducted with 14 facility managers. Focus groups and face-to-face interviews were conducted with 40 facility staff. RESULTS: Managers and staff had similar views regarding most issues. While resident oral health was considered important, regular oral care programmes were limited or lacking. In general, high care facility residents did not have regular dental checkups, while those in low-level care facilities usually visited their own dentist for checkups or treatment. Barriers to maintaining regular oral care included: resident noncompliance; financial concerns; lack of co-operation from family; mobility issues; and lack of interest from dental professionals. Suggested improvements to current services included regular on-site visits, staff education and specialised dental professionals. CONCLUSION: Residents face many barriers to maintenance of adequate oral health care, particularly those who are functionally dependent and cognitively impaired. There is an urgent need for appropriate oral care programmes for aged care residents, which include dentists with aged care experience and continuing education for facility staff. Any major programmes should be evaluated carefully.

Dental visits in older Western Australians: a comparison of urban, rural and remote residents.

OBJECTIVE: It has been reported that the aged in rural areas may not access regular dental care. The aim of this study was to describe dental visits for those 60 years of age and older living in urban, rural and remote locations in Western Australia and to determine factors associated with such visits. The main outcome was having had a dental visit in the previous 12 months. DESIGN: A cross-sectional telephone survey was conducted. SETTING: Urban, rural and remote locations in Western Australia. SUBJECTS: A total of 2100 participants, 60 years of age and older. RESULTS: The present study demonstrated that people in rural and remote areas of Western Australia had a longer time since their last dental visit than people in urban areas. Within each sex, age, country of birth, income, occupation and education group, the highest proportion of people having attended a dentist in the previous 12 months was in urban areas and the lowest was in remote areas. Controlling for sex, age, education and oral health status, compared to urban residents, rural residents were 14% less likely to have seen a dentist and remote residents were 27% less likely. CONCLUSION: The present study demonstrated that for the aged sector of the Western Australian population, geographical location is a major factor in the frequency of use of dental services and the reasons for dental visits. This raises concerns that improvement of oral health by prevention and early detection of tooth and gum problems is less likely to occur in rural and remote areas than in urban areas.